Hi Hannah,
We may be neighbors (Huntsville).
I am growing numerous fruit trees on a slight slope that has clay about 6 to 10 inches of top soil on top.
After I cleared the area I put down 8 to 10 inches of wood chips to control weed growth and also put some biology into the soil.
I had access to all the wood chips I could handle and I have a small tractor so I could handle a lot.
After several years (started fall of 2020) I cleared up the decayed wood chips and put down various cover crops.
Started with Winter Wheat and Barley over winter. Was not a heavy producer but the roots help break up the clay.
This spring I put down some deer plot seed mix.
The deer plot cover crops I found at the local Farmer Coop have all that Dr. Redhawk recommended. Turnip, Tillage Radish, Rape Seed, Clovers....
I added more tillage radish and sweet Beets also. I let these root vegetables rot in the ground in order to get more nutrients into the soil.
This will be my first real crop of Persimmons, Jujube, Goumi and Asian Pears. Pawpaws take longer and I am only seeing a few of them.
Takes time but the trees I am growing seem to be robust and clay is not a show stopper.
My goal is to trap as much rain on this land as possible.